AT89C51AC3-RDTIM datasheet(67/141 Pages) ATMEL

tên linh kiện	AT89C51AC3-RDTIM

Giải thích chi tiết về linh kiện	Enhanced 8-bit Microcontroller with 64KB Flash Memory

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AT89C51AC3

4383A–8051–10/04

Mode 0 (13-bit Timer)

Mode 0 configures Timer 0 as an 13-bit Timer which is set up as an 8-bit Timer (TH0

(see Figure 35). The upper three bits of TL0 register are indeterminate and should be

ignored. Prescaler overflow increments TH0 register.

Figure 35. Timer/Counter x (x = 0 or 1) in Mode 0

Mode 1 (16-bit Timer)

Mode 1 configures Timer 0 as a 16-bit Timer with TH0 and TL0 registers connected in

cascade (see Figure 36). The selected input increments TL0 register.

Figure 36. Timer/Counter x (x = 0 or 1) in Mode 1

FTx

CLOCK

TRx

TCON reg

TFx

TCON reg

GATEx

TMOD reg

÷ 6

Overflow

Timer x

Interrupt

Request

C/Tx#

TMOD reg

TLx

(5 bits)

THx

(8 bits)

INTx#

See the “Clock” section

TRx

TCON reg

TFx

TCON reg

GATEx

TMOD reg

Overflow

Timer x

Interrupt

Request

C/Tx#

TMOD reg

TLx

(8 bits)

THx

(8 bits)

INTx#

FTx

CLOCK

÷ 6

See the “Clock” section

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